It would be very difficult. If you look at my pics above and in this write-up here, you can get a visual sense of what your working with.
Speaker Spacers for Touring Model
It might be possible to make a spacer for one similar to what I did, but it would be a very tight fit to get the 6x9 on your spacer and also have the spacer use the factory bolt points (by having you spacer bolt directly to the door and eliminating the factory plastic spacer thingy). I think it depends on what your're willing to do and go thru in order to make it work. In my point of view, probably isn't worth the time and invest.